Demon Slayer: My Wife Is Shinobu Kocho!

An anime fan get transmigrated into the world of Demon Slayer. He finds out he is the descendant of Yorichii Tsugikuni, the greatest demon slayer of all time. Born with the Demon Slayer Mark, Tsugikuni Kuga knows his age was limited. Regardless, he will do everything to rescue everyone. Tsugikuni Kuga looks at the horizon and thinking, 'Muzan, just wipe your old ass. The new Demon Slayer Corps are coming. But, before that...' "Shinobu, come hug me..!"